Editing World Opponent Network (section)

{{use mdy dates|date=April 2023}}
{{short description|Former online video game service}}
{{Infobox software
| name           = World Opponent Network
| logo           = WON_logo.gif
| logo alt       = Logo for the World Opponent Network
| other_names    = Sierra Internet Gaming System (SIGS)
| developer      = [[Sierra On-Line]]
| released       = {{ubl|SIGS: {{Start date and age|1996}}{{r|casino}}|WON: {{Start date and age|1998|04|13}}{{r|won launch gs}}}}
| discontinued   = yes
| genre          = {{ubl|[[Online service|Online video game service]]|[[Electronic authentication|User authentication]]|[[Multiplayer online game|Multiplayer]]|[[Matchmaking (video games)|Matchmaking]]|[[Online chat|Chat]]|[[Downloadable content]]}}
| license        = [[Proprietary software|Proprietary]]
| website        = [https://web.archive.org/web/20090323080047/http://www.won.net/ won.net]
}}

[[File:SIGS_logo_1997.gif|thumb|alt=Second logo for the Sierra Internet Gaming System (SIGS logo with text underneath)|Second SIGS logo]]

The '''World Opponent Network''' ('''WON''' or '''WON.net''') was an online video game service, originally developed by [[Sierra On-Line]] as the '''Sierra Internet Gaming System''' ('''SIGS'''). SIGS-based and WON-based servers operated from 1996 until 2008.{{r|casino}}{{r|sierra 2008 eol}}

WON was used by games such as ''[[Homeworld]]'', ''[[Half-Life (video game)|Half-Life]]'', ''[[Outpost 2]]'', ''[[Star Trek: Armada]]'', ''[[Soldier of Fortune (video game)|Soldier of Fortune]]'' and ''[[Dark Reign 2]]'', the free games ''[[Silencer (video game)|Silencer]]''  and ''[[Attack Retrieve Capture|ARC]]'', as well as the [[Hoyle's Official Book of Games|Hoyle series]] of casino, card and board games.